panic: kWerAneRNlI NdGi:a gnSoPLs NOtT LiOcW EasRsEeDr tOioN nSY S"CduALLp e 13==7 N U-1LL2"3 28fa69il2e9d6: fEXiIle T "0/ s9y zkaStopped at savectx+0xae: movl $0,%gs:0x680 TID PID UID PRFLAGS PFLAGS CPU COMMAND 468841 17517 0 0x8000000 0 1 syz-executor.5 *137368 48217 0 0x8000002 0 0 syz-executor.3 savectx() at savectx+0xae end of kernel end trace frame: 0x7204b683e840, count: 14 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu1: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 144 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7204b683e840, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800039e29210 rbx 0 rdx 0 rcx 0xffff80002a25a568 rax 0x3d r8 0xffff800039e29140 r9 0xffffffffffffffff r10 0x2556a6bf931ae79e r11 0x2e013de206850189 r12 0 r13 0 r14 0xffff80002a25a568 r15 0 rip 0xffffffff815483ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff800039e29190 ss 0x10 savectx+0xae: movl $0,%gs:0x680 ddb{0}> show proc PROC (syz-executor.3) tid=137368 pid=48217 tcnt=1 stat=onproc flags process=8000002 proc=0 runpri=17, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a24f4a0,0xffff80002a24ef90 process=0xffff800038bcf5c8 user=0xffff800039e24000, vmspace=0xfffffd8070fd78a8 estcpu=36, cpticks=4, pctcpu=0.5, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 27952 368593 7753 0 2 0x8000000 syz-executor.1 65070 74759 47483 0 2 0x8003000 syz-executor.0 17517 468841 72042 0 7 0x8000000 syz-executor.5 17517 131572 72042 0 3 0xc000080 netcon syz-executor.5 52917 421856 88469 0 3 0x8000080 nanoslp syz-executor.7 52917 11219 88469 0 3 0xc000080 netacc syz-executor.7 52917 34572 88469 0 3 0xc000080 fsleep syz-executor.7 61574 132650 48921 0 3 0x8000080 nanoslp syz-executor.2 61574 387628 48921 0 3 0xc000080 fsleep syz-executor.2 61574 348448 48921 0 3 0xc000080 kqread syz-executor.2 61574 33271 48921 0 3 0xc000080 fsleep syz-executor.2 93725 257643 30510 0 2 0x8000480 syz-executor.4 93725 51271 30510 0 3 0xc000080 fsleep syz-executor.4 93725 17557 30510 0 3 0xc000080 sbwait syz-executor.4 52780 129380 0 0 3 0x14200 acct acct 72042 494637 52585 0 2 0x8000482 syz-executor.5 30510 413988 52585 0 2 0x8000002 syz-executor.4 *48217 137368 52585 0 7 0x8000002 syz-executor.3 86078 297792 52585 0 3 0x8000082 wait syz-executor.6 88469 389527 52585 0 2 0x8000002 syz-executor.7 48921 313377 52585 0 3 0x8000082 nanoslp syz-executor.2 7753 450048 52585 0 3 0x8000082 nanoslp syz-executor.1 47483 335291 52585 0 3 0x8000082 nanoslp syz-executor.0 70132 76085 1 0 3 0x18100083 ttyin getty 67420 400586 0 0 3 0x14200 bored sosplice 2284 150435 46569 0 3 0x18100082 netio arp 46569 433746 1 0 3 0x810008a sigsusp sh 52585 373275 40209 0 3 0x1a000082 wait syz-fuzzer 52585 76192 40209 0 3 0x1e000082 nanoslp syz-fuzzer 52585 183915 40209 0 3 0x1e000082 thrsleep syz-fuzzer 52585 485207 40209 0 3 0x1e000082 thrsleep syz-fuzzer 52585 160167 40209 0 3 0x1e000082 wait syz-fuzzer 52585 198570 40209 0 3 0x1e000082 wait syz-fuzzer 52585 372426 40209 0 3 0x1e000082 thrsleep syz-fuzzer 52585 84114 40209 0 3 0x1e000082 thrsleep syz-fuzzer 52585 14875 40209 0 3 0x1e000082 thrsleep syz-fuzzer 52585 110114 40209 0 3 0x1e000082 wait syz-fuzzer 52585 502362 40209 0 3 0x1e000082 thrsleep syz-fuzzer 52585 426870 40209 0 3 0x1e000082 wait syz-fuzzer 52585 409474 40209 0 3 0x1e000082 wait syz-fuzzer 52585 367010 40209 0 3 0x1e000082 wait syz-fuzzer 52585 169131 40209 0 3 0x1e000082 kqread syz-fuzzer 52585 9318 40209 0 3 0x1e000082 wait syz-fuzzer 40209 405887 38732 0 3 0x810008a sigsusp ksh 38732 29974 43809 0 3 0x1800009a kqread sshd 43809 196019 1 0 3 0x18000088 kqread sshd 12234 198133 29633 73 3 0x19100090 kqread syslogd 29633 15910 1 0 3 0x18100082 sbwait syslogd 24877 412118 1 0 3 0x18100080 kqread resolvd 63133 186573 0 0 3 0x14200 bored smr 80136 50862 0 0 2 0x14200 zerothread 8592 199591 0 0 3 0x14200 aiodoned aiodoned 17728 89372 0 0 3 0x14200 syncer update 61841 421116 0 0 3 0x14200 cleaner cleaner 83646 76200 0 0 3 0x14200 reaper reaper 5690 443989 0 0 3 0x14200 pgdaemon pagedaemon 93132 498578 0 0 3 0x14200 bored viomb 73426 255201 0 0 3 0x40014200 acpi0 acpi0 19162 523016 0 0 3 0x40014200 idle1 66630 54973 0 0 3 0x14200 bored softnet3 97691 279485 0 0 3 0x14200 bored softnet2 63204 62765 0 0 3 0x14200 bored softnet1 53979 215791 0 0 3 0x14200 bored softnet0 65577 95421 0 0 3 0x14200 bored systqmp 8792 52208 0 0 3 0x14200 bored systq 86152 61029 0 0 3 0x14200 tmoslp softclockmp 25683 147498 0 0 3 0x40014200 tmoslp softclock 13850 448197 0 0 3 0x40014200 idle0 1 297045 0 0 3 0x8080082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &iopl->mtx r = 0 (0xffff8000000a3088) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 mtx_enter_try+0x103 #2 mtx_enter+0x4e sys/kern/kern_lock.c:266 #3 scsi_xsh_runqueue+0x90 sys/scsi/scsi_base.c:585 #4 scsi_xsh_add+0xcd sys/scsi/scsi_base.c:538 #5 sdstrategy+0x187 sys/scsi/sd.c:567 #6 spec_strategy+0x3c sys/kern/spec_vnops.c:448 #7 VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:634 #8 bwrite+0x1d3 sys/kern/vfs_bio.c:757 #9 ffs_update+0x27f sys/ufs/ffs/ffs_inode.c:111 #10 ffs_truncate+0x987 #11 ufs_rmdir+0x295 sys/ufs/ufs/ufs_vnops.c:1265 #12 VOP_RMDIR+0x12a sys/kern/vfs_vops.c:413 #13 dounlinkat+0x20e sys/kern/vfs_syscalls.c:1889 #14 syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] #14 syscall+0x854 sys/arch/amd64/amd64/trap.c:577 #15 Xsyscall+0x128 CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b3e2210) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1157 #1 mtx_enter_try+0x103 #2 mtx_enter+0x4e sys/kern/kern_lock.c:266 #3 pmap_enter+0x1c6 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_enter+0x1c6 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:425 [inline] #3 pmap_enter+0x1c6 sys/arch/amd64/amd64/pmap.c:2716 #4 uvm_fault_upper_lookup+0x2b2 #5 uvm_fault+0x129 sys/uvm/uvm_fault.c:605 #6 upageflttrap+0x8e sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x22a sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 17517 (syz-executor.5) thread 0xffff80002a24f730 (468841) Process 48217 (syz-executor.3) thread 0xffff80002a25a568 (137368) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10235 6463K 7302K 166960K 37441 0 pcb 20 15K 17K 166960K 3750 0 rtable 230 19K 21K 166960K 10039 0 pf 60 13K 15K 166960K 1277 0 ifaddr 62 24K 29K 166960K 1506 0 ifgroup 111 4K 4K 166960K 2071 0 sysctl 4 1K 2K 166960K 63 0 counters 94 40K 41K 166960K 1286 0 ioctlops 0 0K 4K 166960K 2834 0 iov 1 2K 28K 166960K 1404 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1422 89K 90K 166960K 18971 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 156K 260K 166960K 561 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 1907 0 dirhash 12 2K 3K 166960K 678 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 19 69K 109K 166960K 23509 0 sigio 0 0K 0K 166960K 446 0 proc 54 55K 128K 166960K 9132 0 subproc 117 7K 10K 166960K 3649 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 3461 0 in_multi 73 5K 7K 166960K 3590 0 ether_multi 1 0K 0K 166960K 297 0 mrt 1 0K 0K 166960K 73 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 127 572K 572K 166960K 127 0 exec 0 0K 1K 166960K 6324 0 pfkey data 0 0K 1K 166960K 29 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 308 122K 138K 166960K 196869 0 UVM aobj 820 66K 66K 166960K 906 0 pinsyscall 34 68K 100K 166960K 31374 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 1484 0 NDP 26 0K 1K 166960K 1146 0 temp 78 6808K 14746K 166960K 1017524 0 kqueue 7 12K 30K 166960K 3519 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 2821 0 2819 6 5 1 3 0 8 0 rtentry 112 3522 0 3441 7 3 4 4 0 8 0 unpcb 144 18717 0 18705 25 24 1 6 0 8 0 syncache 336 13 0 13 4 4 0 1 0 8 0 sackhl 24 2 79 2 2 2 0 1 0 8 0 tcpqe 32 24 0 24 1 1 0 1 0 8 0 tcpcb 808 6495 0 6486 12 10 2 2 0 8 1 arp 120 663 0 643 1 0 1 1 0 8 0 inpcb 384 24081 0 24066 39 37 2 8 0 8 0 nd6 136 963 0 943 6 5 1 2 0 8 0 pkpcb 40 168 0 168 19 18 1 1 0 8 1 kcovpl 48 280 0 271 1 0 1 1 0 8 0 ppxss 1168 230 0 230 19 18 1 1 0 8 1 pffrag 232 154 0 146 2 1 1 2 0 482 0 pffrnode 88 135 0 129 1 0 1 1 0 8 0 pffrent 40 1995 0 1987 2 1 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 1323 0 1155 2 0 2 2 0 8 0 pfstkey 128 1323 0 1155 7 0 7 7 0 8 0 pfstate 376 1323 0 1155 21 2 19 21 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 15 0 13 11 9 2 3 0 8 0 art_heap4 256 12634 0 12309 74 48 26 31 0 8 0 art_table 32 12649 0 12322 5 1 4 4 0 8 0 art_node 16 3454 0 3383 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 7 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 1905 0 1895 1 0 1 1 0 8 0 shmpl 112 903 0 86 24 0 24 24 0 8 0 dirhash 1024 461 0 444 3 0 3 3 0 8 0 dino2pl 256 40110 0 38420 106 0 106 106 0 8 0 ffsino 272 40110 0 38420 115 1 114 114 0 8 0 nchpl 144 75097 0 74495 66 40 26 66 0 8 0 uvmvnodes 80 15189 0 0 310 0 310 310 0 8 0 vnodes 216 15189 0 0 844 0 844 844 0 8 0 namei 1024 276093 0 276093 9 8 1 2 0 8 1 percpumem 16 657 0 596 1 0 1 1 0 8 0 vcpupl 3904 49 0 6 6 0 6 6 0 8 0 vmpool 696 169 0 126 7 2 5 5 0 8 0 kstatmem 264 1244 0 1192 7 2 5 5 0 8 0 scsiplug 72 58 0 58 24 24 0 1 0 8 0 scxspl 216 290804 0 290804 60 56 4 8 1 8 4 plimitpl 152 4572 0 4554 1 0 1 1 0 8 0 sigapl 424 23344 0 23297 10 2 8 9 0 8 0 futexpl 64 383931 0 383927 10 9 1 1 0 8 0 knotepl 120 1103 0 0 19 0 19 19 0 8 0 kqueuepl 216 8015 0 8008 17 16 1 5 0 8 0 pipepl 320 3882 0 3851 14 11 3 4 0 8 0 fdescpl 496 23270 0 23243 9 5 4 5 0 8 0 filepl 152 170145 0 169886 39 27 12 17 0 8 0 lockfpl 104 8134 0 8133 1 0 1 1 0 8 0 lockfspl 48 3628 0 3627 1 0 1 1 0 8 0 sessionpl 144 278 0 262 1 0 1 1 0 8 0 pgrppl 48 575 0 559 1 0 1 1 0 8 0 ucredpl 104 31714 0 31686 1 0 1 1 0 8 0 zombiepl 144 23299 0 23297 2 1 1 1 0 8 0 processpl 1144 23344 0 23297 6 1 5 6 0 8 0 procpl 656 47096 0 47026 10 2 8 9 0 8 0 srpgc 96 254 0 254 21 20 1 1 0 8 1 sosppl 168 73 0 73 23 23 0 1 0 8 0 sockpl 664 46089 0 46059 69 65 4 14 0 8 1 mcl64k 65536 65 0 0 4 1 3 3 0 8 0 mcl16k 16384 27 0 0 3 0 3 3 0 8 0 mcl12k 12288 10 0 0 1 0 1 1 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 16 0 0 2 0 2 2 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 634 0 0 55 20 35 55 0 8 0 mtagpl 96 49 0 0 1 0 1 1 0 8 0 mbufpl 256 935 0 0 30 0 30 30 0 8 0 bufpl 280 84058 0 68869 1086 0 1086 1086 0 8 0 anonpl 24 2730964 0 2724129 162 88 74 101 0 186 0 amapchunkpl 152 618394 0 617687 112 79 33 52 0 158 0 amappl16 200 66004 0 65850 135 114 21 34 0 8 3 amappl15 192 9 0 9 2 2 0 1 0 8 0 amappl14 184 1048 0 1035 2 1 1 2 0 8 0 amappl13 176 38 0 38 3 3 0 1 0 8 0 amappl12 168 27731 0 27697 3 0 3 3 0 8 0 amappl11 160 349 0 337 1 0 1 1 0 8 0 amappl10 152 717 0 710 1 0 1 1 0 8 0 amappl9 144 282 0 281 1 0 1 1 0 8 0 amappl8 136 1947 0 1904 3 0 3 3 0 8 0 amappl7 128 178 0 162 1 0 1 1 0 8 0 amappl6 120 3274 0 3261 2 1 1 2 0 8 0 amappl5 112 1159 0 1150 1 0 1 1 0 8 0 amappl4 104 2576 0 2543 2 0 2 2 0 8 0 amappl3 96 117530 0 117439 3 0 3 3 0 8 0 amappl2 88 24507 0 24447 4 2 2 4 0 8 0 amappl1 80 96913 0 96488 23 10 13 22 0 8 0 amappl 88 192696 0 192493 6 0 6 6 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 905 0 86 15 0 15 15 0 8 0 uaddrrnd 24 23439 0 23369 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 23439 0 23369 1 0 1 1 0 8 0 vmmpekpl 168 151356 0 151293 4 0 4 4 0 8 0 vmmpepl 168 1425450 0 1423626 292 197 95 116 0 357 0 vmsppl 440 23438 0 23369 9 1 8 9 0 8 0 rwobjpl 56 326643 0 309585 268 23 245 245 0 8 1 pdppl 4096 46885 0 46781 522 417 105 115 0 8 1 pvpl 32 46545 0 0 376 0 376 376 0 265 0 pmappl 248 23438 0 23369 6 1 5 5 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 973 0 538 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7204b683e840, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x2e sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0x12b acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x12b sys/dev/acpi/acpitimer.c:125 comcnputc(800,61) at comcnputc+0x1d7 sys/dev/ic/com.c:1269 cnputc(61) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(61) at db_putchar+0x3eb sys/ddb/db_output.c:155 kprintf() at kprintf+0x21c1 sys/kern/subr_prf.c:1064 db_printf(ffffffff828fec8b) at db_printf+0x89 sys/kern/subr_prf.c:498 panic(ffffffff8295f3e7) at panic+0xdb sys/kern/subr_prf.c:216 __assert(ffffffff8291343a,ffffffff828b3717,90,ffffffff82913941) at __assert+0x29 sys/kern/subr_prf.c:157 uvm_pagealloc_pg(fffffd800715e760,fffffd806b3e2250,1c89d000,0) at uvm_pagealloc_pg+0x3e9 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd806b3e2250,1c89d000,0,3) at uvm_pagealloc+0x194 sys/uvm/uvm_page.c:912 end trace frame: 0xffff800035965b30, count: 0 ddb{1}> trace x86_ipi_db(ffff800029cebff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 x86_bus_space_io_read_4(b008,0) at x86_bus_space_io_read_4+0x2e sys/arch/amd64/amd64/bus_space.c:666 acpitimer_delay(1) at acpitimer_delay+0x12b acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x12b sys/dev/acpi/acpitimer.c:125 comcnputc(800,61) at comcnputc+0x1d7 sys/dev/ic/com.c:1269 cnputc(61) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(61) at db_putchar+0x3eb sys/ddb/db_output.c:155 kprintf() at kprintf+0x21c1 sys/kern/subr_prf.c:1064 db_printf(ffffffff828fec8b) at db_printf+0x89 sys/kern/subr_prf.c:498 panic(ffffffff8295f3e7) at panic+0xdb sys/kern/subr_prf.c:216 __assert(ffffffff8291343a,ffffffff828b3717,90,ffffffff82913941) at __assert+0x29 sys/kern/subr_prf.c:157 uvm_pagealloc_pg(fffffd800715e760,fffffd806b3e2250,1c89d000,0) at uvm_pagealloc_pg+0x3e9 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd806b3e2250,1c89d000,0,3) at uvm_pagealloc+0x194 sys/uvm/uvm_page.c:912 pmap_get_ptp(fffffd806b3e2200,72277d0fa000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1215 pmap_enter(fffffd806b3e2200,72277d0fa000,4d717000,3,20) at pmap_enter+0x2c6 sys/arch/amd64/amd64/pmap.c:2722 uvm_fault_upper_lookup(ffff800035965de0,ffff800035965e18,ffff800035965ce0,ffff800035965d60) at uvm_fault_upper_lookup+0x2b2 uvm_fault(fffffd806acc8dd0,72277d0fb000,0,2) at uvm_fault+0x129 sys/uvm/uvm_fault.c:605 upageflttrap(ffff800035965f60,72277d0fb5ac) at upageflttrap+0x8e sys/arch/amd64/amd64/trap.c:188 usertrap(ffff800035965f60) at usertrap+0x22a sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x72277d0fb590, count: -21